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Say goodbye to those eight-letter passwords. The 12-character era of online security is upon us, according to a report published this week by the Georgia Institute of Technology. The researchers used clusters of graphics cards to crack eight-character passwords in less than two hours. But when the researchers applied that same processing power to 12-character passwords, they found it would take 17, 134 years to make them snap. "The length of your password in some cases can dictate the vulnerability, " said Joshua Davis, a research scientist at the Georgia Tech Research Institute. It’s hard to say what will happen in the future, but for now, 12-character passwords should be the standard, said Richard Boyd, a senior research scientist who also worked on the project. The researchers recommend 12-character passwords—as opposed to those with 11 or, say, 13 characters—because that number strikes a balance between "convenience and security." Passwords have gotten longer over time, and security experts are already recommending that people use full sentences as passwords.